Novi Ririyanti, sitanggang nathanael, daryanto eka. Principal Transformational Leadership, School Culture, and Productivity of Medan Johor High School. SNKP [Internet]. 2024 Jul. 29 [cited 2025 Aug. 10];2:102-11. Available from: https://www.ejournal.ummuba.ac.id/index.php/SNKP/article/view/2149